Safe boltwork mechanism.



Patented Aug. 20, IQDI.

C. A. BERRY.

SAFE BOLTWORK MECHANISM.

(Application filed Apr. 22, 1901.)

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C. A. BERRY.

SAFE BOLTWORK MECHANISM.

(Application filed. Apr. :22, 1901.)

2 Sheets-8heet 2.

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WITNESSES .TH: Nonms PETERS c0. PHOTOAJTHO wumuaron, o. c

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CHARLES A. BERRY, OF STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE do TOWNE MANUFACTURING COMPANY, OF SAME PLACE.

SAFE BOLTWORK MECHANISM.

SPECIFICATION forming part of Letters Patent No. 680,686, dated August20, 1901. Application filed April 22, 1901. Serial No. 56,967. (Nomodel.)

To all whom, it may concern:

Be it known that 1, CHARLES A. BERRY, of Stamford, in the county ofFairfield and State of Connecticut, have invented certain new and usefulImprovements in Safe Boltwork Mechanism; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention reletes to an improvement in safe boltwork mechanism, andmore particularly to improvements on the constructions disclosed inPatent No. 403,527, granted E. W. Fowler May 21, 1889, and Patent. No.403,563, granted E. Stockwell May 21, 1889. These patents discloseconstructions wherein locking and unlocking springs are employed forcasting and retracting the bolts, the casting-springs being released bya trip actuated by the closing of the safe-door, while theretracting-springs are released by time-lock mechanism. Both the lockingand unlocking springs are set or put under compression by a setting-upwrench,and the compound levers, which operate to hold theunlockingsprings under tension until the time arrives for unlocking, arealso set by the same operation which puts the springs under tension.These patents have, in addition to the looking or casting and unlockingor retracting springs above'referred to, a reserve set ofretractingsprings connected to the bolt mechanism, so that if for anyreason the primary unlockingsprings should fail to operate the continuedoperation of the time-lock will Within a stated time thereafter throwinto operation the reserve unlocking-springs, which in order to make theoperation certain are of much greater strength than the primaryunlockingsprings, so that when the reserve unlocking springs are trippedby the operation of the time-lock there will be power sufficient tosurely retract the bolts. Normally this re serve power does not comeinto operation unless by reason of failure of the primaryunlocking-springs to retract the bolts, and the power of the reserveunlocking-springs is great enough to overcome any resistance likely tooccur. After the reserve unlockingspring has been released it isessential, howand unlocking springs cannot be set until af ter thereserve unlocking-springs have been set.

A further object is to provide means for preventing the reserve springsagainst operation until after the primary unlocking-springs have beenreleased and failed to retract the bolts.

With these ends in view myinvention consists in the parts andcombinations of parts, as Will be more fully explained and pointed outin the claims.

In the accompanying drawings, Figure l is a view in elevation of aportion of the boltwork-actuating mechanism, disclosing my inventionapplied thereto. Fig. 2 is a side view of same, partly in section. Fig.3 is a view, in rear elevation, showing the spring-chainber andcarriages; and Fig. at is a sectional view of sameon the line so on ofFig. 3.

1 represents an angle-plate designed to be secured to the carrying-barof the boltwork. This angle-bar is, as shown in Fig. 2, provided on itsouter face with a plurality of air-cylinders 2, in which the pistons 3rest. The pistons 3 are rigidly secured to the end wall 4c of the casing5, and it will be seen that as the angleplate l is moved toward and awayfrom the casing 5, as it does in withdrawing and shooting the bolts, theair-cylinders and pistons therein serve to regulate and control themovements of the parts, thus preventing injurious shocks to the time andother mechanisms carried in the casing 5, as fully explained in thepatents above referred to. Bearing against the face of the angle-plate1, adjacent to the casing 5, are the puslyblocks 6, which latter areslidingl y mountedin the end of casing 5 and receive the ends of thelockingsprings 7, while the primary unlockingsprings 8 are locatedWithin the casing on opposite sides of the springs 7, and the reserveunlocking-springs 9 are located in a com partment of the casing belowthe springs 7 and 8. Bearing against the ends of the springs 7 and 8 isthe cross-head 10, and bearing against the springs 9 is the cross-head11, the former of which carries a withdrawing-bar 12, While the lattercarries withdrawing-bar 12*. These bars pass loosely through slots inthe angleplate 1 and are provided at their free ends with heads 13,which are adapted to engage the rear face of the angle-plate.

It will be seen from the above that when the cross-heads 10 and 11 aremoved to compress the springs the push-blocks 6, bearing against theangle-plate, will tend to force it and the bolts (not shown) carriedthereby out to a locked position, but are restrained by a trip or otherwell-known device, which prevents such movement until the door shallhave been closed. The push-blocks being released, the locking-springsthrow the bolts, thus locking the door. The primary and reserveretracting-springs are still retained under tension and are held sountil the proper time arrives, when the time mechanism releases theprimary nnlocking-springs in the well-known and usual manner, whichretracts or tends to retract the bolts. If the primary unlocking devicesfail to operate, the reserve unlocking mechanism is after apredetermined time released by the time mechanism and adds its power tothat of the primary unlocking device.

The two cross-heads l0 and 11 are connected by the links l-L with thecranks 15, the latter being mounted in the casing 5. The hubs of thesecranks are provided on their outer faces, as shown in Fig. 1, withrecesses for the entrance of the pins of the settingwrench and are eachalso provided with a hook. The hook 16 on the reserve spring mechanismis engaged by the hook on the spring-actuated lever 17, which latter ispivoted at 18 and is provided at its free end with a pin 19, which restsin slot 20 in lever 21. This lever 21 is pivoted at 22 and carries a lug23, which latter is designed to be engaged by the hook-lever 2t, pivotedat 25, the upper end of said hook-lever resting in close contact withthe lower end of pivoted lever 26. The upper end of this lever 26 restsin proximity to the pivoted hook-lever 27, which latter is actuated bythe time mechanism of the lock, and its hooked end is adapted to restunder the lug 28 on pivoted lever 29. This lever 29 is provided with aslot 30, in which the pin 31 of the hook-lever'32 rests. This hook-leveris spring-actuated and is provided with a hook 33,which engages the hook34 on the hub of the crank '15 of the primary unlocking devices.

The mechanism thus far described is substantially the same as that shownand claimed in the Stockwell and Fowler patents above referred to. Inboth of these patented devices provision was made whereby the casings orcarriages containing the primary and reserve springs were automaticallydisconnected when the primary bolts were retracted. This complicated themechanism and at times caused trouble in operation. it would beobjectionable, however, to have the two mechanisms absolutelyindependent,because after the reserve mechanism has been released it isessential that it should be again set up, because, as before stated, theuser of the safe might set up his primary mechanism and imagine from thenoise of the springs that his bolts had been shot forward,when in factthe reserve unlocking mechanism was holding them back, so that the doorcould not be locked. In the present devices the two cross heads for theprimary and reserve springs and their draw-bars are absolutelyindependent; but provision is made that when the primaryunlocking-springs have thrown back the bolts the reserve springs cannotbe unlocked. The means for accomplishing this comprises a connecting-bar35, passing through casing 5 and adapted to be engaged by theangle-plate 1 when the bolts are withdrawn or are in an unlockedposition. When the bar 35 is engaged by the angle-plate, it moves itlongitudinally,thus carrying the pivoted lever 36 toward the lug 23 onlever 21. This pivoted lever 36 carries the sliding spring-pressed latch37, which when the lever is pressed inwardly rests under the lug 23 andprevents the compound levers 17 and 21 from dropping and releasing thehook 16,

which, as previously described, holds the reserve unlocking-springsunder tension. If, however, for any reason the primary unlocking-springsfail to retract the bolts, then the continued movement of the timeslockwill through the hook-lever 27, and lever 26 move the hook of lever 24from under the tongue 23, thus releasing the reserve unlockingmechanism.

In order to prevent setting up or retracting the primaryunlocking-springs until the reserve unlocking-springs have been firstset up, I provide the slide 38, which latter is located under theface-plate of the casing and is provided thereon with the words Set upreserve first, which words show through slots in the face-plate, whilethe reserve unlocking mechanism remains unset. hen the reserve mechanismis properly set, the directions above quoted are obscured by thefaceplate. The plate 38, carrying these directions, is provided at itsupper end with a projecting toe 39, which latter when the reserve is notproperly set projects over a hole in the hub of hook 3i of the primaryunlocking mechanism, and this absolutely prevents the setting up of theprimary unlocking mechan ism until the reserve unlocking mechanism shallhave first been set. The plate 38 is also provided with a depending leg42, having a projection 40 thereon, which is engaged by the shoulder 41on the hub of hook 16 and moves the plate downwardly and away from thehub of the primary unlocking mechanism as the reserve unlockingmechanism is set. Obviously until the reserve is set up and theobstructing slide drops it is a mechanical impossibility to attach thewrench to the primary shaft-hub to set up the primary before the reserveis set up.

It is evident that many slight changes might be resorted to in therelative arrangement of parts herein shown and described Withoutdeparting from the spirit and scope of my invention. Hence I would haveit understood that I do not wish to confine myself to the exactconstruction of parts herein shown and described; but,

Having fully described my invention, What Iclaim as new, and desire tosecure by Letters Patent, is-- 1. In an automatic bolt-operatingmechanism the combination of devices for throwing the bolts, primary andreserve mechanisms for withdrawing the bolts, a series of fasteningmechanisms adapted to release the unlocking mechanisms by the action oftime mechanism and means for preventing the setting up of the primaryunlocking mechanism until the reserve unlocking mechanism shall havebeen set up.

2. In an automatic bolt-operating mechanism the combination of devicesfor throwing the bolts, primary and reserve mechanism for withdrawingthe bolts, fastening mechanisms adapted to release the unlocking mechanisms by the action of time mechanism, and antiindicator for visuallyindicating the position of the reserve unlocking mechanism.

In an automatic boltoperating mechanism the combination of devices forthrowing the bolts, primary and reserve bolt-unlocking devices,fastening mechanisms adapted to release the unlocking mechanisms by theaction of time mechanism, and an indicator for visually indicating theposition of the reserve unlocking mechanism and for obstructing thesetting up of the primary unlocking mechanism until the reserveunlocking mechism shall have been set up.

4:. In an automatic bolt-operating mechanism, the combination ofautomatic devices for throwing the bolts, primary and reserve devicesfor withdrawing the bolts, fastening devicesforholdingtheunlockingdevicesagainst operation until released by time mechanism,and a sliding plate actuated by the movements of the reserve unlockingdevice and adapted to prevent the attachment of the setting up wrench tothe primary unlocking mechanism until the reserve unlocking mechanismshall have been set up.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

CHARLES A. BERRY WVitnesses:

SCHUYLER Il/IERRITT, WALTER O. ALLEN.

